save: function (options) {

    let value = this.data.videoVal;

  if(value.length>0){

    let fileName = new Date().valueOf();

    const task = wx.downloadFile({

      url: value,

      filePath: wx.env.USER_DATA_PATH + '/' + fileName + '.mp4',

      success: res => {

          //保存到相册

          let filePath = res.filePath

          wx.saveVideoToPhotosAlbum({

             filePath ,

              success: res => {

                  console.info(res);

                  wx.showToast('视频保存到相册');

                  let fileMgr = wx.getFileSystemManager();

                  // 删除本地文件

                  fileMgr.unlink({

                     filePath: wx.env.USER_DATA_PATH + '/' + fileName + '.mp4',

                     success: function(r) {

                       console.log('unlink-getFileSystemManager')

                       console.log(r)

                     },

                  })

              },

              fail: res => {

                  wx.showToast({

                      title: '保存失败',

                  })

              }

          })

      }

  })

  task.onProgressUpdate(this.onProgress)  

  }

  },